Abstract:
:The 3-dimensional (3-D) distribution of cholinergic neurons located throughout the extent of the entire basal forebrain of young (4-5 months old) and aged (24-25 months old) Fischer-344 rats was examined using choline acetyltransferase immunocytochemistry (ChAT-IR). The number and 3-D position of ChAT-IR neurons spanning the basal forebrain were determined using serial sections and analyzed using computerized image analysis. The effects of aging on ChAT-IR neuron number were analyzed as a cohesive unit with respect to the classically-defined magnocellular subregions located within the basal forebrain (i.e., the medial septum, vertical and horizontal limbs of the diagonal band, and the nucleus basalis). Significant effects of age were found on ChAT-IR neuron number but no significant age-related interactions were noted with either the A-P, M-L, or D-V axes. These results suggest that a significant but diffuse age-related loss of ChAT-IR occurs along the entire length of the basal forebrain, and that this loss is not restricted to individual magnocellular nuclei (A-P axis), the M-L axis, or the D-V axis.
journal_name
Neurobiol Agingjournal_title
Neurobiology of agingauthors
Smith ML,Deadwyler SA,Booze RMdoi
10.1016/0197-4580(93)90126-vsubject
Has Abstractpub_date
1993-07-01 00:00:00pages
389-92issue
4eissn
0197-4580issn
1558-1497pii
0197-4580(93)90126-Vjournal_volume
14pub_type
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